[antlr-interest] Lexer question

[John Howard]

With Gavin Lambert input (Many thanks Gavin) I have moved my grammar 
forward, but still have an issue with one aspect.  I'm trying to parse 
tokens such as '53xx' '6xxx' '3334' and the following simple grammar 
works if I have token SHAPE defined, but if I use shapeDist I get a 
mis-match of against ID for the first 'x'.  333x parses OK, but 33xx 
doesn't.  I can's use SHAPE, because that causes other problems with the 
grammar.  Is there any way I can get shapeDist to work?

Thanks,

John

// This works
dist    
:    '^' SHAPE
;

ID : ('a'..'z'|'A'..'Z'|'_')('a'..'z'|'A'..'Z'|'_'|'0'..'9')+;
SHAPE     :(DIGIT (DIGIT|'*'|'x'|'X') (DIGIT|'*'|'x'|'X') 
(DIGIT|'*'|'x'|'X'));    
DIGIT     : ('0'..'9')    ;
WS  : (' '|'\r'|'\t'|'\n')+{$channel=HIDDEN;} ;



// This fails
dist    
:    '^' shapeDist
;

shapeDist
: (DIGIT (DIGIT|'*'|'x'|'X') (DIGIT|'*'|'x'|'X') (DIGIT|'*'|'x'|'X'))
;

ID : ('a'..'z'|'A'..'Z'|'_')('a'..'z'|'A'..'Z'|'_'|'0'..'9')+;
DIGIT     : ('0'..'9')    ;
WS  : (' '|'\r'|'\t'|'\n')+{$channel=HIDDEN;} ;